In Pakistan, because of small field size, most often 2 or 3 rows windbreaks are used, and should expect the effects to reach only about 12H downwind and _____ upwind:
Correct answer: B. 2H
- A. 1H
- B. 2H
- C. 3H
- D. 4H
Explanation
Windbreak influence generally extends much farther downwind than upwind because the protected air zone develops behind the barrier. For these small-field windbreaks, the cited reach is about 12 tree heights downwind and 2 tree heights upwind.
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